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    <div class="u-title">空气质量指数（AQI）及相关信息</div>
    <table class="table">
      <thead>
      <tr>
        <th width="150">空气质量指数</th>
        <th width="150">空气质量指数级别</th>
        <th width="220">空气质量指数类别及表示颜色</th>
        <th>对健康影响情况</th>
        <th>建议采取措施</th>
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      </thead>
      <tbody>
      <tr>
        <td>0~50</td>
        <td>一级</td>
        <td><span class="aqi aqi-1">优</span>／绿色</td>
        <td>空气质量令人满意，基本无空气污染</td>
        <td>各类人群可正常活动</td>
      </tr>
      <tr>
        <td>51~100</td>
        <td>二级</td>
        <td><span class="aqi aqi-2">良</span>／黄色</td>
        <td>空气质量可接受，但某些污染物可能对极少数异常敏感人群健康有较弱影响</td>
        <td>极少数异常敏感人群应减少户外活动</td>
      </tr>
      <tr>
        <td>101～150</td>
        <td>三级</td>
        <td><span class="aqi aqi-3">优</span>／橙色</td>
        <td>易感人群症状有轻度加剧，健康人群出现刺激症状</td>
        <td>儿童、老年人和心脏病、呼吸病患者减少长时间户外运动</td>
      </tr>
      <tr>
        <td>151~200</td>
        <td>四级</td>
        <td><span class="aqi aqi-4">优</span>／红色</td>
        <td>进一步加剧易感人群症状，可能对健康人群心脏、呼吸系统有影响</td>
        <td>儿童、老年人和心脏病、呼吸病患者避免长时间户外运动，一般人群适量减少户外运动</td>
      </tr>
      <tr>
        <td>201~300</td>
        <td>五级</td>
        <td><span class="aqi aqi-5">优</span>／紫色</td>
        <td>心脏病和肺病患者症状显著加剧，运动耐受力降低，健康人群普遍出现症状</td>
        <td>儿童、老年人和心脏病、肺病患者应停留在室内，停止会户外运动，一般人群减少户外运动</td>
      </tr>
      <tr>
        <td>>300</td>
        <td>六级</td>
        <td><span class="aqi aqi-6">优</span>／褐色</td>
        <td>健康人群运动耐受力降低，有明显强烈症状，提前出现某些疾病</td>
        <td>儿童、老年人和病人应当留在室内，避免体力消耗，一般人群应避免户外活动</td>
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